Sharp X1

X1 (CZ-800C)
Hu-BASIC start screen
ManufacturerSharp Corporation
TypeHome computer
Release date1982 (1982)
Introductory price¥155,000
Discontinued1987
MediaCompact Cassette or floppy disk
Operating systemHu-BASIC, CP/M
CPUSharp Z80 A @ 4 MHz
Memory64 KB RAM, 4-48KB Video RAM, 6KB ROM
Removable storageCassette tape, floppy disc
DisplayText: 40 / 80 x 25 characters; Graphics: 320 x 200 / 640 x 200; 8 colors
SoundAY-3-8910 or Yamaha YM2149 (YM2151 in later revisions)
InputKeyboard, joysticks
Controller input2 joysticks
ConnectivityPrinter port, joystick port, audio out
PowerBuilt in PSU
PredecessorSharp MZ series
SuccessorX68000

The X1 (エックスワン, Ekkusuwan), sometimes called the Sharp X1 or CZ-800C, is a series of home computers released by Sharp Corporation from 1982 to 1987. It is based on a Zilog Z80 CPU.

The RGB display monitor for the X1 had a television tuner, and a computer screen could be superimposed on TV. All the TV functions could be controlled from a computer program. The character font was completely programmable (PCG) with 4-bit color, and was effectively used in many games. The entirety of the VRAM memory was mapped on to the I/O area, so it was controlled without bank switching. These features made the X1 very powerful for game software.